Page:A hundred years hence - the expectations of an optimist (IA hundredyearshenc00russrich).pdf/141

 itself be anything but a momentary expedient. The effects of deforestation have for some time been observed and the plan of improving waterless areas by the contrary process is already discussed. While it seems rather a "large order" to undertake to meddle with the balance of atmospheric composition on a large scale, especially as we know so little of the conditions that even success might very possibly be attended by unforeseen and perhaps calamitous results, there is nothing intrinsically absurd in the notion that we might adopt means on a vast scale for increasing oceanic evaporation and, utilising the exact foreknowledge of winds and air currents which we shall certainly have achieved, bring moisture and rain to arid tracts or countries suffering from drought. The operation would no doubt require to be stupendous, but the next century is not going to be afraid of stupendous operations; and anticipating vast and unforeseen progress in meteorology, it would be hazardous to believe that no practical use will be made of such progress.

While our knowledge and mastery of the planet we possess, and of its forces, are being steadily advanced by scientific discovery, and the researches of the pure scientist are constantly yielding practical results at first undreamed of, it is impossible to doubt that man's knowledge of himself will make equal